1.) We synthesized 150 nm highly monodisperse superparamagnetic colloidal particles with high surface charge. 2.) We incorporated these particles into the glucose sensing hydrogel and demonstrated that it changed diffraction with changes in glucose concentration. 3.) We built a hydrophone sound detection instrument that could monitor acoustic responses from the hydrogel photonic crystal with the superparamagnetic particles. 4.) Unfortunately, in spite of extensive efforts, we did not find any acoustic response when varying the magnetic field strength in the hydrogel material. 5.) In the above studies we dramatically varied the hydrogel composition and the superparamagnetic particle composition, and the methods used to apply the magnetic field. No publications, references or appendices.

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